CVEvulnerability
CVE-2026-11352
7.5 HIGH
Official page ↗
- Status
- Modified
- Published
- 2026-07-03
- Last modified
- 2026-09-15
- Assigner
- 2499f714-1537-4658-8207-48ae4bb9eae9
- CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
- 7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weaknesses
- CWE-835
Description
An issue in curl’s QUIC UDP receive function allows a malicious HTTP/3 server
to trigger a remote denial of service against a curl or libcurl client.
Because the helper function discards zero-length UDP datagrams before counting
them toward the per-call packet budget, a connected QUIC peer can continuously
stream empty datagrams to indefinitely stall the client.
Affected configurations
• haxx curl (>= 8.18.0 < 8.21.0)
Related
Weakness · CWE (1)
- CWE-835 Loop with Unreachable Exit Condition weakness
References
- https://curl.se/docs/CVE-2026-11352.html Patch, Vendor Advisory
- https://curl.se/docs/CVE-2026-11352.json Vendor Advisory
- https://hackerone.com/reports/3783438 Exploit, Issue Tracking, Third Party Advisory
- https://hackerone.com/reports/3783438 Exploit, Issue Tracking, Third Party Advisory